Javascript chrome console error

Question

While looking at my code with console in chrome i saw this error:

Uncaught ReferenceError: Invalid left-hand side in assignment LINE 99

But i can't understand what's wrong here

function drawMatrix(matrix, offset) {
matrix.forEach((row, y) => {           //THATS LINE 99
    row.forEach((value, x) => {        //OF COURSE THATS LINE 100
        if (value !== 0) {
            context.fillStyle = colors[value];
            context.strokeStyle = "#dee5e3";
            context.lineWidth = 0.1;
            context.strokeRect(x + offset.x, y + offset.y , 1, 1);
            context.fillRect(x + offset.x,
                             y + offset.y,
                             1, 1);
        }
    });
});}

I'm pretty sure there must be an error even at line 100 then, probably related to => but i can't understand what kind. Can you help me?

Answer 1

The error says "left-hand side in assignment", so look for a maybe fault "assignment" like var a = b, and a is not present in this scope or something like this.

So, as @epascarello says, maybe the line number in the console does not match.